ScriptParameterNodeWithOptions.cs

using System.Collections.Generic;
using System.Threading.Tasks;
using Waher.Things.Attributes;
 
namespace Waher.Things.Script.Parameters
{
    public abstract class ScriptParameterNodeWithOptions : ScriptParameterNode
    {
        public ScriptParameterNodeWithOptions()
        {
        }
 
        [Page(2, "Script", 100)]
        [Header(88, "Restrict to options.")]
        [ToolTip(89, "If only values defined in options are valid values.")]
        public bool RestrictToOptions { get; set; }
 
        public override bool ChildrenOrdered => true;
 
        public override Task<bool> AcceptsChildAsync(INode Child)
        {
            return Task.FromResult(Child is ScriptOptionNode);
        }
 
        public async Task<KeyValuePair<string, string>[]> GetOptions()
        {
            if (!this.HasChildren)
                return null;
 
            IEnumerable<INode> Children = await this.ChildNodes;
            if (Children is null)
                return null;
 
            List<KeyValuePair<string, string>> Result = null;
 
            foreach (INode Child in Children)
            {
                if (Child is ScriptOptionNode Option)
                {
                    if (Result is null)
                        Result = new List<KeyValuePair<string, string>>();
 
                    Result.Add(new KeyValuePair<string, string>(Option.Label, Option.Value));
                }
            }
 
            return Result?.ToArray();
        }
    }
}